Evolutionary ecology of the prezygotic stage.
D000818:Animals; D005075:Biological Evolution; D003163:Competitive Behavior; D003307:Copulation; D005260:Female; D015870:Gene Expression; D019684:Magnoliopsida / Q000502:physiology*; D008297:Male; D011058:Pollen / Q000502:physiology*; D012098:Reproduction; D012641:Selection, Genetic; D012727:Sex Characteristics; D012726:Sexual Behavior, Animal; D013094:Spermatozoa / Q000502:physiology*